Method of cutting strip shingles



, 1,514 446 11 1927' A. R. LUKENS T f a 8 j Y 10 3 Patented Jan. 11,1927.

UNITED STATES PATIENT; oFFIcE'.

ALAN R. LUKENS, OF WYOMING, OHIO, A-SSIGNOR TO THE BICEABD BON COIIPANY,OF

CINCINNATI, OHIO, A CORPORATION OF OHIO.

METHOD OF CUTTING STRIP SHINGLES.

Application filed August 3Q, 1922. Serial No. 585,190.

My invention relates to the formation of a slab or strip shingle whichis distinguished by the fact that it is formed with tabs or projectionsinterspaced b v non-projecting portions which have a size suliicient toexpose a panel-like portion of roof, with the projections of larger sizethan the spaces, so

as to give an over-lapping effect when laying the slabs in courses on aroof.

" The difliculty in connection with the manufacture of special designsof roofing is that they must be cut so as to effect the greatestpossible economy of roofing material.

. According to my invention in the socalled wide spaced slab shingle,set forth in my U. S. Patent No. 1,348,503 dated August 3, 1920 I savedthe loss of roofing and at the same time made other than a symmetricalcut of the uneven edge of slab shingles, by cutting out interspacedoversize or giant shingles from a strip or roofing, and

then slicing the roofing so as to bisect the spaces left by the cut,thereby forming at both sides of the slice, the desired serrated oruneven-edge for a roofing slab.

The process of so cutting out aslab shingle of the special kind desiredaccording to my patent, would result in what I believe to be anoverproduction of giant shingles, as far as the market at present isconcerned. I have accordingly worked out the method of cutting of thepresent application so as to provide for the cutting out of ordinarysize shingles, or even undersize shingles, with the resulting productionof a slab shingle of the same type set forth in my patent, but which hasthe additional advantage of having shorter projections, so that tendencyto curl is avoided. I preserve the substantially same economy incoverage as in my former slab, with the same thickness of roofingthroughout the roof.

Another advantage which I have by my new process, is that I utilize theentire sheet of roofing material in the cutting machine in theproduction of salable products in proper proportion, and at the sametime obtain slab shingles which are always alike, instead of being leftsand rights, as in my former application.

Theseobjects I accomplish by that certain construction and arrangementof parts to be; hereinafter more specifically pointed out and claimed.In the drawings, the figure is a plan View of a portion of a section ofroofing showing the slab shingles and individual shingles, and themethod of cutting them out.

I wish to note at the outset that my present invention has to do withthe improvement of the wide space effect slab shin le,

and the economy of cutting as well, an is capable of variation dependingupon the size of individual size shingle, which it is desired toproduce. Y

In its essence the slab shingle is one having a butt or lengthwiseextending portion 1, and projections 2, interspaced by spaces 3 whichare of less Width than the projections. The projections are lengthwiseof the slab equal in length to the individual shingle to be cut out, andthe width of the projections and of the spaces, crosswise of the slab,is equal to the difference between the length of an individual shingleand its width and the dimension of the spaces is equal lengthwise of theslab to the width of an individ ual shingle.

It is thus possible to assume any size of individual shingle, since itwill always be of greater length than breadth, (considering shingledimensions) and produce a slab shingle in which the projections or tabsare long (considering the dimensions of. the slab) and stubby, so as toprevent curling and give a decided effect on the roof, which is notfound in uniform thickness roofing of ordinary character.

The dimensions of shingles made of com position roofing, are naturallylimited b accepted dimensions in wooden and slate lIldlvidual shinglesor tiles. Wooden shingles thus are of several characters. Standard size8by 12% inches :--Sub'si ze or siding shingles less in both or either onedimension than individuals :Giant or oversize shingles 9 or 10 inches by12%, 14 or 16 inches.

According to my invention I may produce four shingles of one selectedcharacter and four more shingles of the same or a different characterfor each pair of wide space slabs.

- In doing this I may produce different effects in the shape and spacingof the projections.

.Also in doing this I can, to a measure, fit

machine which happens to be available in the roofing factory.Furthermore, my cutting can be done without removing the cutouts untilthe cutting is complete.

In the example shown all individual shingles are of the same size. lheentire view of the drawing shows asection cut lengthwise from a sheet ofprepared roofing material, of suflicientwidth to produce pairs of slabshingles facing each other. f

In forming the cut' of the roofing piece continuous lengthwise, lines ofcut 4, 4, are made dividing up the piece into the double sections ofwhich the view is one. Along the center of each double section a line ofcut is made.

The lilies of cut 6 defining the outer edges of the tabs or projectionsare inter-spaced iengthwise of the piece and the lines 7 defining theinner walls of the non-projecting spaces, are also interspacedlengthwise, of the sheet.

The lines 6 are the length of a desired individual shingle, and areinterspaced crosswise of the sheet sntliciently to leave a space whichis twice the width of the desired shingle 8, whose length is that ofline 6. The line 5 divides the space between the cuts 6. thereby formingthe side edge of a pair of shingles.

Pairs of lines of cut 9, 9, crosswise of the sheet are made, said cutsextending from the cuts 7 across the sheet, thereby tormi'ngthe edges ofthe tabs orprojections, and at the same time defining individualshirwles 10, of which the line 5 forms one edge and the lines 7 form theother edges.

The lines 9' also define the ends of the shingles 8.

It can now be observed that the width of the tabs or projections isequal to the difference between the width of the shingles 8 and thelength of the shingles 10, and that the width of the shingles 10 governsthe width of the interprojection spaces.

It can also be observed that the shingles 10 and 8 need not be of thesame dimensions but can be varied.

In cutting out the slabs so as to leave two projections for each slab,and half of a nonprojection space at each end I form lines of cut 11crosswise of the sheet, interspaced as desired, but preferably alwaysbisecting a space or line 7.

\Vhere the roofing machine of the menu facturer can take care of a givennumber of inches in wldth as a maximum, the placing of the knives on thecutting rolls can be such as to arrange the total width of the cutting,

b regul atin til m 8, which are cut out. From the dimensions given ofthe various standard sizes of shing it will be evident that this willgive a number of inches leeway out of a total, for example of seventyinches.

The width of the butts 1 of the slabs or. strips is closely related tothe width of the tabs or projections, so that in layin the slabs inoverlapping courses there will be sufficient underlap of courses to givethe desired thickness over-all of rooting material. The standard methodof laying the slab shingle shown in'the drawings will be for theprojections of one course to come about to the edge of theinterprojection spaces of the slabs of the preceding course. Also forgoodzefi'ect the projections should be placed sothat th'eir center is ona line with the center of theadjacent space of the course beneath.

If it is desired to form T-shaped individual shin" es the slabs could becut also at the line 2.

The variation in exact-shape of the design shown in the drawings shouldnot be construed as a departure from. the principles of my invention,which I will now proceed to set forth in theappended claims.

Having thus described my invention, what 1 claim as new and desire tosecure by Letters Patent, is

1. A methodofifcutting out without waste slab shingles which consists individing a sheet of roofing-material in slabs having inters )acedshingle simulating projections exten ing toward each other but separatedby a portion of roofing adapted in size to form one or more shinglepieces. I

2. A method of cutting out, without waste, slab shingles from a sheet ofroofing material, which consists in dividing a sheet of said materialinto slabs, with interspaced shin 'le simulating projections extendingtowar. s and abutting each other in which the projections lengthwise ofthe slab are equal to the length of the individual shingle, and thedepth of the projections are equal to the difference between the lengthof an individual shingle and its width, and in which the space betweenthe projections is equal to the width of the individual shingle.

I ALAN R. LUKENS.

the width of the shingle sec-.

